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Research: Stale Office Air Is Making You Less Productive

Harvard Business Review

Last, we tested three levels of carbon dioxide (CO 2) in the air: low levels (600 parts per million) that result from high ventilation rates, a typical level seen in many offices (950 ppm), and higher levels that are commonly encountered in U.S. schools (1400 ppm). This makes buildings, in essence, a human resource tool.